docs: def to_gexf(graph, output_path):
      """Writes graph to `GEXF <http://gexf.net>`_.
  
      Uses the NetworkX method
      `write_gexf <http://networkx.lanl.gov/reference/generated/networkx.readwrite.gexf.write_gexf.html>`_.
  
      Parameters
      ----------
      graph : networkx.Graph
          The Graph to be exported to GEXF.
      output_path : str
          Full path, including filename (without suffix).
          e.g. using "./graphFolder/graphFile" will result in a GEXF file at
          ./graphFolder/graphFile.gexf.
      """
      warnings.warn("Removed in 0.8.", DeprecationWarning)
  
      graph = _strip_list_attributes(graph)
  
      nx.write_gexf(graph, output_path + ".gexf")